Welcome to HVAC-Talk.com, a non-DIY site and the ultimate Source for HVAC Information & Knowledge Sharing for the industry professional! Here you can join over 150,000 HVAC Professionals & enthusiasts from around the world discussing all things related to HVAC/R. You are currently viewing as a NON-REGISTERED guest which gives you limited access to view discussions

To gain full access to our forums you must register; for a free account. As a registered Guest you will be able to:

Participate in over 40 different forums and search/browse from nearly 3 million posts.

mini split troubles

hey guys iv got a question for ya. iv got a mini split here that im having a problem with. for some reason i cant pull a vaccum on the system past 1000, so i charged with nitrogen to find the leak to 150 low side and it held for an hour no fluctuations at all also soap checked all fittings and no leaks. i put a micron gauge on the pump itself and it pulls past 400 so i know its not the guage or vaccum but i still cant pull past 1000, 1500 on the sysytem so here is where you guys come in any suggestions?

pump gets fresh oil on every startup and drained 5 min after turnoff il try cleaning the sensor
by the way pump does pull down to 50 i was just making sure the gauge would even read past 1000 thats why i only went to 400